# Choice Matrix vs Piggy Knowledge

The clearest difference is price: Piggy Knowledge at Free against Choice Matrix's $1.99. Piggy Knowledge also leads on iOS requirement (11.0 vs 13.0). Choice Matrix's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Piggy Knowledge is free to download; Choice Matrix costs $1.99 up front. Piggy Knowledge sells 1 one-off in-app purchase. Choice Matrix asks for nothing beyond the download.

## The numbers

| Metric | Choice Matrix | Piggy Knowledge |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | — |
| Size | 18 MB | 50 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yury Bederov](https://appshunter.io/developer/1676470703) | [Rolling Pig Studio](https://appshunter.io/developer/1039625108) |

## What reviewers say

### Choice Matrix

[App page](https://appshunter.io/ios/app/choice-matrix/id6446178169)

**In-app purchases:** none


### Piggy Knowledge

[App page](https://appshunter.io/ios/app/piggy-knowledge/id6466038846)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $0.99 | one-time |


## Frequently asked questions

### Is Choice Matrix free?

Choice Matrix costs $1.99, with no in-app purchases.

### Is Piggy Knowledge free?

Piggy Knowledge is free to download, with in-app purchases available.

### Do Choice Matrix or Piggy Knowledge have ads?

Neither Choice Matrix nor Piggy Knowledge shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*